Chevy started using them around '92 in 3/4 and 1 tons. Dodge started using them in '94 when the new body style came out. There is a heavy duty and a light duty version available, the Dodge diesels (and maybe V10s?) used the heavy duty version, not sure on the others. The Cummins is the only application I'm aware of that people are having problems with them. The first couple years they were used in the Chevys, the first gear was 6.? : 1, after that it was 5.? : 1. The newer trannies have better gear splits when on the street, 3rd to 4th is a pretty big jump still.

As for identification, they have a pto cover on each side, the case is iron, and the tailhousing on mine is aluminum. Be sure to only use the fluid specified on the pto cover, I think it is Castrol Syntorq. Its expensive, around $56 a gallon from standard transmission. The wrong fluid tears up the syncronizers.

Useful Searches

>
About Us>
>
In May of 1999 CK5 started out as a tribute to America's favorite 4x4 utility truck. Since then it has grown to be
a leader among full size Chevrolet K5 Blazer and GMC Jimmy web sites across the Internet. CK5 has since expanded
to include the C/K series GM Truck and Suburban as well as past and present GM models.
>>
With its technical articles, factory specifications, photo gallery, classifieds, active message forum, product
reviews and original automotive content it's an unbeatable source.